Khloé Kardashian and Lamar Odom have put their former marital home on the open market.

As the Keeping Up with the Kardashians star was pictured working out with rumoured new beau Matt Kemp on Thursday - her sprawling 8,400 square-foot mansion in the upscale Mulholland Park gated-community in Tarzana, California for $5.5 million.

The 29-year-old was spotted leaving her Beverly Hills gym in fashionable leggings and her standard aviators. Baseball player Matt left shortly after.

She filed for divorce from the professional basketball player, 34, in December after four years of marriage, following months of rumours he cheated on her and was addicted to drugs, has listed their sprawling 8,400 square-foot mansion in the upscale Mulholland Park gated-community in Tarzana, California for $5.5 million.

(Image: X17)

The former couple bought the seven bedroom, nine bathroom house in both their names in December 2009 for $3.95 million three months after they got married after just one month of dating, according to The Real Estalker website.

The house, which regularly featured on the couple's own E! reality series 'Khloé & Lamar', also boasts a home cinema, a gourmet kitchen, stone floors, an outdoor kitchen, pool, spa and a private terrace with expansive San Fernando Valley views.

(Image: X17)

Khloé, who is worth $18 million, cited "irreconcilable differences" in papers to end her marriage to Lamar, and is not seeking spousal support from the former LA Clippers player, who has an estimated fortune of $100 million.

A source previously claimed that their prenuptial agreement would enable Khloé to keep their home, her $1 million engagement ring, and she would also be awarded a $2 million cash pay-out.

The 29-year-old star denied she was putting the house on the market in early November as friends insisted she was desperately trying to save her marriage.